Description: DBRef is a special type of reference used in NoSQL databases, specifically in MongoDB, that allows referencing documents located in other collections. This mechanism facilitates the creation of relationships between different data sets, which is essential in an environment where data normalization is not as strict as in relational databases. A DBRef consists of three parts: the identifier of the referenced document, the name of the collection where that document is located, and optionally, the name of the database. This structure allows developers and applications to efficiently access related data without the need to duplicate information. Through DBRefs, links can be established between documents, enhancing data integrity and facilitating the querying of related information. However, it is important to note that excessive use of references can lead to suboptimal performance, as it involves multiple database queries to retrieve related data.
